﻿//------------------------------------------------------------------------------
//  此代码版权声明为全文件覆盖，如有原作者特别声明，会在下方手动补充
//  此代码版权（除特别声明外的代码）归作者本人Diego所有
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//------------------------------------------------------------------------------

namespace ThingsGateway.Foundation.SiemensS7;

/// <inheritdoc/>
internal class SiemensMessage : MessageBase, IResultMessage
{
    /// <inheritdoc/>
    public override int HeadBytesLength => 4;

    public ReadOnlyMemory<byte> SendBytes { get; set; }

    public override void SendInfo(ReadOnlyMemory<byte> sendBytes)
    {
        SendBytes = sendBytes;
    }

    /// <inheritdoc/>
    public override bool CheckHeadBytes(byte[]? headBytes)
    {
        if (headBytes == null || headBytes.Length < 4)
            BodyLength = 0;
        int length = (headBytes[2] * 256) + headBytes[3] - 4;
        if (length < 0)
            length = 0;
        BodyLength = length;
        return headBytes != null && headBytes[0] == 3 && headBytes[1] == 0;
    }
}
